com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: Too many connections
最简单的办法是因为你的my.ini中设定的并发连接数太少或者系统繁忙导致连接数被占满解决方式：打开MySQL安装目录打开MY.INI找到max_connections默认是100.--实例WINDOWS解决mysql Errno.:1040错误XXXXinfo:CannotconnecttoMySQLserv...
ORA-30678: too many open connections
文档解释ORA-30678:toomanyopenconnectionsCause:Anattempttoopenaconnectionfailedbecausetoomanyarealreadyopenbythissession.Thenumberofallowedconnectionsvariesassomemay...
ORA-24401: cannot open further connections
文档解释ORA-24401:cannotopenfurtherconnectionsCause:Sufficientnumberofconnectionsarenotpresentinthepooltoexecutethecall.NonewconnectionscanbeopenedastheconnMaxparam...
ORA-16143: RFS connections not allowed during or after terminal recovery
文档解释ORA-16143:RFSconnectionsnotallowedduringorafterterminalrecoveryCause:Anattemptwasmade,byanRFSprocess,toaccessastandbyonlinelogfileduringorafteraterminalreco...
ORA-24399: invalid number of connections specified
文档解释ORA-24399:invalidnumberofconnectionsspecifiedCause:Aninvalidcombinationofminimum,maximumandincrementnumberofconnectionswasspecifiedintheOCIConnectionPoolCre...
ORA-16173: incompatible archival network connections active
文档解释ORA-16173:incompatiblearchivalnetworkconnectionsactiveCause:Oneoftwosituationscancausethiserror:1)AnattempttostartaTerminalIncompleteRecoveryoperationfailed...
ORA-12528: TNS:listener: all appropriate instances are blocking new connections
文档解释ORA-12528:TNS:listener:allappropriateinstancesareblockingnewconnectionsCause:Allinstancessupportingtheservicerequestedbytheclientreportedthattheywereblockin...
ORA-24778: cannot open connections
文档解释ORA-24778:cannotopenconnectionsCause:Themigratabletransactiontriedtoaccessaremotedatabasewhenthesessionitselfhadopenedconnectionstoremotedatabase(s).Action:...
ORA-06113: NETTCP: Too many connections
文档解释ORA-06113:NETTCP:ToomanyconnectionsCause:Themaximumno.ofconcurrentlyopenconnectionshasbeenreached.Action:Exitanapplicationwithanopenconnectionwhichisnolonge...